fix: remove default dynamics

[redeboer]

Implements ComPWA/expertsystem#395 (release 0.6.4) and removes the default dynamics.

tensorwaves/src/tensorwaves/physics/helicity_formalism/amplitude.py

Lines 159 to 160 in ca494ea

	if decaying_state.name not in self._dynamics:
	self._dynamics.set_breit_wigner(decaying_state.name)

That was an implementation that seemed convenient, but modified the dynamics section of the input AmplitudeModel.

Note that a long-term fix should come through #172 and ComPWA/expertsystem#22

[redeboer]

Note: 10e115e has to be reverted once ComPWA/expertsystem#395 is through and expertsystem==0.6.4 is released

[codecov]

Codecov Report

Merging #180 (9d4e16f) into master (6c23889) will decrease coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #180      +/-   ##
==========================================
- Coverage   76.25%   76.17%   -0.08%     
==========================================
  Files          12       12              
  Lines         598      596       -2     
  Branches       85       84       -1     
==========================================
- Hits          456      454       -2     
  Misses        107      107              
  Partials       35       35              

Flag	Coverage Δ
unittests	76.17% <ø> (-0.08%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ensorwaves/physics/helicity_formalism/amplitude.py	72.83% <ø> (-0.21%)	⬇️